Inconsistent syntax highlighting between various types of code blocks
Looking at this page, it seems that syntax highlighting (and line spacing) is inconsistent between code blocks marked as editable vs. ignore.
I find the colors somewhat better for ignore, but the drawback is that it's not editable, and the extra line spacing is not necessary.
editable block:

ignore block:

Yes, you're quite right! I reported this upstream as well: https://github.com/rust-lang/mdBook/issues/1796.
I remember playing around with using the Ace editor for all code (and then toggling the read-only mode for blocks which are not editable). I can probably dig that code out again from somewhere :smile:
Glad to see it's already reported upstream :)